Research on Radiation Crosslinking Thermoplastic Polyurethane Elastomers
With the development of the polymer materials industry,people's lives have greatly improved.Thermoplastic polyurethane elastomers(TPU),due to their unique molecular structure,have received increasing attention in recent years.To further broaden their application range,specially designed TPUs were subjected to reactive polymerization and granulation for sample preparation.Subsequently,these products were treated with high-energy electron beam radiation.Before and after radiation treatment,a series of equipment such as gas chromatography-mass spectrometry,differential scanning calorimetry(DSC),thermogravimetric analysis(TGA),parallel plate rotational rheometer,universal mechanical testing machine,and rotary abrasion testing machine were used to test and compare the performance of the products.Additionally,scanning electron microscopy(SEM)was used to analyze the surface condition of the products before and after irradiation.The research found that a certain dose of radiation treatment can induce crosslinking in TPU,and the glass transition temperature of the crosslinked product remains largely unchanged.In terms of thermal stability,there was a significant improvement in the product.Its modulus increased,and the mechanical strength showed a trend of decreasing first and then increasing.Although the wear resistance at room temperature decreased slightly,the wear resistance at an elevated temperature of 80 ℃ significantly improved.This study not only demonstrates that radiation treatment can significantly enhance the performance of TPU in certain key physical properties but also greatly expands its application scope and provides new solutions for material selection in specialized application scenarios.
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